<template>
  <div class="panel-tab__content">
    <el-form size="small" label-width="90px" @submit.prevent>
      <el-form-item label="回路特性">
        <el-select v-model="loopCharacteristics" @change="changeLoopCharacteristicsType">
          <!--bpmn:MultiInstanceLoopCharacteristics-->
          <el-option label="并行多重事件" value="ParallelMultiInstance" />
          <el-option label="时序多重事件" value="SequentialMultiInstance" />
          <!--bpmn:StandardLoopCharacteristics-->
          <el-option label="循环事件" value="StandardLoop" />
          <el-option label="无" value="Null" />
        </el-select>
      </el-form-item>
      <template
        v-if="loopCharacteristics === 'ParallelMultiInstance' || loopCharacteristics === 'SequentialMultiInstance'"
      >
        <el-form-item label="循环基数" key="loopCardinality">
          <el-input v-model="loopInstanceForm.loopCardinality" clearable @change="updateLoopCardinality" />
        </el-form-item>
        <el-form-item label="集合" key="collection">
          <el-input v-model="loopInstanceForm.collection" clearable @change="updateLoopBase" />
        </el-form-item>
        <el-form-item label="元素变量" key="elementVariable">
          <el-input v-model="loopInstanceForm.elementVariable" clearable @change="updateLoopBase" />
        </el-form-item>
        <el-form-item label="完成条件" key="completionCondition">
          <el-input v-model="loopInstanceForm.completionCondition" clearable @change="updateLoopCondition" />
        </el-form-item>
        <el-form-item label="异步状态" key="async">
          <el-checkbox v-model="loopInstanceForm.asyncBefore" label="异步前" @change="updateLoopAsync('asyncBefore')" />
          <el-checkbox v-model="loopInstanceForm.asyncAfter" label="异步后" @change="updateLoopAsync('asyncAfter')" />
          <el-checkbox
            v-model="loopInstanceForm.exclusive"
            v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore"
            label="排除"
            @change="updateLoopAsync('exclusive')"
          />
        </el-form-item>
        <el-form-item
          label="重试周期"
          prop="timeCycle"
          v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore"
          key="timeCycle"
        >
          <el-input v-model="loopInstanceForm.timeCycle" clearable @change="updateLoopTimeCycle" />
        </el-form-item>
      </template>
    </el-form>
  </div>
</template>

<script>
export default {
  name: 'ElementMultiInstance',
  props: {
    businessObject: Object,
    type: String,
  },
  inject: {
    prefix: 'prefix',
  },
  data() {
    return {
      loopCharacteristics: '',
      //默认配置，用来覆盖原始不存在的选项，避免报错
      defaultLoopInstanceForm: {
        completionCondition: '',
        loopCardinality: '',
        extensionElements: [],
        asyncAfter: false,
        asyncBefore: false,
        exclusive: false,
      },
      loopInstanceForm: {},
    }
  },
  watch: {
    businessObject: {
      immediate: true,
      handler(val) {
        this.bpmnElement = window.bpmnInstances.bpmnElement
        this.getElementLoop(val)
      },
    },
  },
  methods: {
    getElementLoop(businessObject) {
      if (!businessObject.loopCharacteristics) {
        this.loopCharacteristics = 'Null'
        this.loopInstanceForm = {}
        return
      }
      if (businessObject.loopCharacteristics.$type === 'bpmn:StandardLoopCharacteristics') {
        this.loopCharacteristics = 'StandardLoop'
        this.loopInstanceForm = {}
        return
      }
      if (businessObject.loopCharacteristics.isSequential) {
        this.loopCharacteristics = 'SequentialMultiInstance'
      } else {
        this.loopCharacteristics = 'ParallelMultiInstance'
      }
      // 合并配置
      this.loopInstanceForm = {
        ...this.defaultLoopInstanceForm,
        ...businessObject.loopCharacteristics,
        completionCondition: businessObject.loopCharacteristics?.completionCondition?.body ?? '',
        loopCardinality: businessObject.loopCharacteristics?.loopCardinality?.body ?? '',
      }
      // 保留当前元素 businessObject 上的 loopCharacteristics 实例
      this.multiLoopInstance = window.bpmnInstances.bpmnElement.businessObject.loopCharacteristics
      // 更新表单
      if (
        businessObject.loopCharacteristics.extensionElements &&
        businessObject.loopCharacteristics.extensionElements.values &&
        businessObject.loopCharacteristics.extensionElements.values.length
      ) {
        this.loopInstanceForm['timeCycle'] = businessObject.loopCharacteristics.extensionElements.values[0].body
      }
    },
    changeLoopCharacteristicsType(type) {
      // this.loopInstanceForm = { ...this.defaultLoopInstanceForm }; // 切换类型取消原表单配置
      // 取消多实例配置
      if (type === 'Null') {
        window.bpmnInstances.modeling.updateProperties(this.bpmnElement, { loopCharacteristics: null })
        return
      }
      // 配置循环
      if (type === 'StandardLoop') {
        const loopCharacteristicsObject = window.bpmnInstances.moddle.create('bpmn:StandardLoopCharacteristics')
        window.bpmnInstances.modeling.updateProperties(this.bpmnElement, {
          loopCharacteristics: loopCharacteristicsObject,
        })
        this.multiLoopInstance = null
        return
      }
      // 时序
      if (type === 'SequentialMultiInstance') {
        this.multiLoopInstance = window.bpmnInstances.moddle.create('bpmn:MultiInstanceLoopCharacteristics', {
          isSequential: true,
        })
      } else {
        this.multiLoopInstance = window.bpmnInstances.moddle.create('bpmn:MultiInstanceLoopCharacteristics')
      }
      window.bpmnInstances.modeling.updateProperties(this.bpmnElement, {
        loopCharacteristics: this.multiLoopInstance,
      })
    },
    // 循环基数
    updateLoopCardinality(cardinality) {
      let loopCardinality = null
      if (cardinality && cardinality.length) {
        loopCardinality = window.bpmnInstances.moddle.create('bpmn:FormalExpression', { body: cardinality })
      }
      window.bpmnInstances.modeling.updateModdleProperties(this.bpmnElement, this.multiLoopInstance, {
        loopCardinality,
      })
    },
    // 完成条件
    updateLoopCondition(condition) {
      let completionCondition = null
      if (condition && condition.length) {
        completionCondition = window.bpmnInstances.moddle.create('bpmn:FormalExpression', { body: condition })
      }
      window.bpmnInstances.modeling.updateModdleProperties(this.bpmnElement, this.multiLoopInstance, {
        completionCondition,
      })
    },
    // 重试周期
    updateLoopTimeCycle(timeCycle) {
      const extensionElements = window.bpmnInstances.moddle.create('bpmn:ExtensionElements', {
        values: [
          window.bpmnInstances.moddle.create(`${this.prefix}:FailedJobRetryTimeCycle`, {
            body: timeCycle,
          }),
        ],
      })
      window.bpmnInstances.modeling.updateModdleProperties(this.bpmnElement, this.multiLoopInstance, {
        extensionElements,
      })
    },
    // 直接更新的基础信息
    updateLoopBase() {
      window.bpmnInstances.modeling.updateModdleProperties(this.bpmnElement, this.multiLoopInstance, {
        collection: this.loopInstanceForm.collection || null,
        elementVariable: this.loopInstanceForm.elementVariable || null,
      })
    },
    // 各异步状态
    updateLoopAsync(key) {
      const { asyncBefore, asyncAfter } = this.loopInstanceForm
      let asyncAttr = Object.create(null)
      if (!asyncBefore && !asyncAfter) {
        this.loopInstanceForm['exclusive'] = false
        asyncAttr = { asyncBefore: false, asyncAfter: false, exclusive: false, extensionElements: null }
      } else {
        asyncAttr[key] = this.loopInstanceForm[key]
      }
      window.bpmnInstances.modeling.updateModdleProperties(this.bpmnElement, this.multiLoopInstance, asyncAttr)
    },
  },
  beforeUnmount() {
    this.multiLoopInstance = null
    this.bpmnElement = null
  },
}
</script>
